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Finding the Fourth Proportional to 121,443.66, 181,822.19 and 64,387.53

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Solution

The fourth proportional to 121,443.66, 181,822.19 and 64,387.53 is: 96,399.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,443.66 : 181,822.19 = 64,387.53 : x
  2. Step 2: Convert to fraction form
    121,443.66/181,822.19 = 64,387.53/x
  3. Step 3: Cross multiply
    121,443.66x = 181,822.19 × 64,387.53
  4. Step 4: Simplify right side
    121,443.66x = 11,707,081,391.35
  5. Step 5: Solve for x
    x = 11,707,081,391.35/121,443.66
  6. Step 6: Final answer
    x = 96,399.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.